Hilton Head Island in January experiences mild winter conditions. Typical daytime high temperatures range from the mid-50s to low 60s Fahrenheit (12-16 degrees Celsius), while nighttime lows average in the low 40s Fahrenheit (4-7 degrees Celsius). Rainfall is moderate, averaging around 3-4 inches for the month. Ocean temperatures are cool, generally too chilly for comfortable swimming for most people.
The island’s pleasant winter climate offers opportunities for outdoor activities like golfing, tennis, and cycling without the summer heat and humidity. Reduced crowds compared to peak season make it an attractive time for visitors seeking a quieter experience. Historically, January has been a popular period for snowbirds escaping colder northern climates to enjoy the island’s natural beauty and amenities. This off-season period also presents potential cost savings on accommodations and some activities.